[49~50] 다음 글을 읽고, 물음에 답하시오. A man found a cocoon of a butterfly. One day a small opening appeared. He sat and watched the butterfly for several hours as it struggled to force its body through that little hole. Then it seemed to stop making any progress. It appeared as if it had gotten as far as it could, and it could go no further. So the man decided to help the butter..